(248n) Gaseous o-Xylene Biodegradation in Two-Liquid Phase Airlift Bioreactor and Biotrickling Filter Configurations Conference: AIChE Annual MeetingYear: 2015Proceeding: 2015 AIChE Annual MeetingGroup: Environmental DivisionSession: Poster Session: Environmental Division Time: Monday, November 9, 2015 - 6:00pm-8:00pm Authors: Wu, C., Zhejiang University Li, W., Zhejiang University Biotrickling filter (BTF) applications in two-liquid phase bioreactors (TLPB) are limited by the lack of agitation, ozone clogging in the long term and a further promotion in mass transfer. Versus a two-liquid phase BTF with silicone oil as a non-aqueous phase, a two-liquid phase airlift bioreactor (ALR) was developed to remove gaseous o-xylene. A higher elimination capacity of 26% was obtained for the two-liquid phase ALR (92 g·m-3·h-1, removal efficiency of 91%) versus the two-liquid phase BTF. Removal efficiency of the two-liquid phase ALR was constant and above 90% regardless of the inlet concentration. More complete removal of o-xylene was observed for the two-liquid phase ALR under both steady state and shock-load conditions. Therefore, sufficient mixing is essential to the TLPBs for the removal of hydrophobic VOCs. However, microbial diversity in the two-liquid phase ALR was not richer than that of the two-liquid phase BTF. The dominant microbial community was Comamonas in the two-liquid phase ALR, Chitinophagaceae in the two-liquid phase BTF.